PT0E-11912

Portable Gas Detector

RX-8000
Operating Manual(PT0-119)

<Contents>
1. Outline of the Product........................................................................................................... 2
1-1. Preface .............................................................................................................................. 21-2. Purpose of use .................................................................................................................. 2
1-3. Definition of DANGER, WARNING, CAUTION, and NOTE ............................................... 3
1-4. Method of confirmation for Standards and Explosion proof specification .......................... 3
2. Important Notices on Safety ................................................................................................. 42-1. Danger cases .................................................................................................................... 42-2. Warning cases .................................................................................................................. 62-3. Names of internal product components ............................................................................. 72-4. Safety information (Applicable for ATEX/IECEx/UKEX)..................................................... 93. Product Components ............................................................................................................ 103-1. Main unit and standard accessories .................................................................................. 103-2. Names and functions for each part ................................................................................... 124. How to Use ........................................................................................................................... 144-1. Before using the gas detector ........................................................................................... 144-2. Preparation for start-up ..................................................................................................... 144-3. Basic operating procedures............................................................................................... 184-4. How to start the gas detector ............................................................................................ 194-5. How to detect .................................................................................................................... 214-6. Modes ............................................................................................................................... 234-7. Air calibration mode ........................................................................................................... 244-8. Display/setting mode ......................................................................................................... 264-9. Pump OFF mode............................................................................................................... 294-10. Manual memory mode .................................................................................................... 304-11. How to exit ....................................................................................................................... 31
5. Operations and Functions .................................................................................................... 32
5-1. Fault alarm pattern ............................................................................................................ 32
5-2. Other functions .................................................................................................................. 33
6. Maintenance ......................................................................................................................... 34
6-1. Maintenance intervals and items ....................................................................................... 34
6-2. Gas calibration .................................................................................................................. 36
6-3. How to clean ..................................................................................................................... 40
6-4. Parts replacement ............................................................................................................. 41
7. Storage and Disposal ........................................................................................................... 43
7-1. Procedures to store the gas detector or leave it for a long time ........................................ 43
7-2. Procedures to use the gas detector again ......................................................................... 44
7-3. Disposal of products .......................................................................................................... 44
8. Troubleshooting .................................................................................................................... 45
9. Product Specifications .......................................................................................................... 47
9-1. List of specifications .......................................................................................................... 47
9-2. List of accessories............................................................................................................. 48
10. Definition of Terms .............................................................................................................. 49-1-RX-8000

1 Outline of the Product1-1. Preface

1

Outline of the Product1-1. Preface
Thank you for choosing our portable gas detector RX-8000. Please check that the model number of theproduct you purchased is included in the specifications on this manual.
This manual explains how to use the gas detector and its specifications. It contains information required forusing the gas detector properly. Not only the first-time users but also the users who have already used theproduct must read and understand the operating manual to enhance the knowledge and experience before
using the indicator/alarm unit.

1-2. Purpose of use
This product is a portable explosion-proof gas detector that measures the concentration of combustible gas
and oxygen in crude oil vapors, etc. in inert gases or atmosphere.
Detection results are not intended to guarantee life or safety in any way.
There are 4 kinds of line up for this mode. Check the specifications before use and conduct gas detection
properly in accordance with purposes.
In addition to this operating manual, an operating manual for the data logger management program (option)
is available for the gas detector. Request RIKEN KEIKI if it is needed.
Product line up
ProductDetectable gas
Combustible (HC)RX-8000 (HC/O2)〇
RX-8000 (CH4/O2)
RX-8000 (HC)〇RX-8000 (CH4)
HC : Isobutane (i-C4H10) calibration

Combustible (CH4)〇〇-2-

Oxygen (O2)〇〇-RX-8000

1 Outline of the Product1-3. Definition of DANGER, WARNING, CAUTION, and NOTE

1-3. Definition of DANGER, WARNING, CAUTION, andNOTE
DANGER

This message indicates that improper handling may cause serious damage on
life, health or assets.

WARNING

This message indicates that improper handling may cause serious damage on
health or assets.

CAUTION

This message indicates that improper handling may cause minor damage on
health or assets.

NOTE

This message indicates advice on handling.

1-4. Method of confirmation for Standards andExplosion proof specification
This instrument has some specification depends on standard and explosion proof certificate. Please confirm
the detector specification before using. Please refer Declaration of Conformity that is at the end of thismanual if you have CE/UKCA marking type.
You can confirm instrument specification to see name plate as follows.

UKCAmarking

EX/CE marking
Japan Ex marking

Name plate attachment position-3-RX-80002 Important Notices on Safety

2-4. Safety information (Applicable for ATEX/IECEx/UKEX)

2-4. Safety information (Applicable for ATEX/IECEx/UKEX)
Observe the followings to maintain an explosion-proof system.
<Overseas Specifications>
Outline of the product This product is a portable explosion-proof gas detector that measures the concentration ofcombustible gas and oxygen in crude oil vapors, etc. in inert gases or atmosphere.
 Gases are drawn by the built-in pump.
 As a power supply, either Li-ion battery unit (BUL-8000(R), BUL-8000(R1)) or dry battery unit(BUD-8000(R)) can be used.
 The battery unit can be replaced by users.
Technical data
Explosion-proof
Explosion-proof class Ex ia IIC T4 Ga
specifications
II1G Ex ia IIC T4 Ga
Ambient temperature -20 °C - +50 °C
Ambient temperature 0 °C - 40 °C(for charging)ElectricalPower supply About lithium ion battery unit (BUL-8000(R),specifications
BUL-8000(R1))
Two Lithium ion cells of BP-8000 (MaxellINR18650PB1 or SDI INR18650-15M or SONY
US18650VT3. Um = 250 V) are connected in parallelto the Lithium ion battery unit.
 About dry battery unit (BUD-8000(R))
Alkaline AA batteries, type LR6 manufactured byToshiba can be used.
 Maxell CR1220 battery is used for backup.
Certificate
IECEX
IECExDEK13.0091
numbers
ATEX
DEKRA13ATEX0228
DEKRA21UKEX0360
UKEX
Applied
IEC60079-0:2017 IEC60079-11:2011
standards
EN IEC 60079-0:2018 EN60079-11:2012
BS EN IEC 60079-0:2018 BS EN60079-11:2012
Precautions

How to readinstruction
number Do not charge the Lithium ion battery unit in ahazardous location.
 Charge the Lithium ion battery unit using thededicated charger.
 Do not replace the battery unit in a hazardouslocation.
 Do not replace batteries in the dry battery unit in ahazardous location.
 Do not modify or change the circuit or structure, etc.
 Use either Lithium ion battery unit (BUL-8000(R),BUL-8000(R1)) or dry battery unit (BUD-8000(R)).
Dry batteries used for the dry battery unit(BUD-8000(R)) are Alkaline AA batteries, type LR6manufactured by Toshiba.
INST.No.0 0 000 0000 00
AB C D E
A: Manufacturing year (0-9)
B: Manufacturing month (1-9, XYZ for Oct.-Dec.)
C: Manufacturing lot
D: Serial number
E: Manufacturing code

Manufacturer
RIKEN KEIKI CO., LTD.
2-7-6 Azusawa, Itabashi-ku, Tokyo, 174-8744 JapanWeb site: https://www.rikenkeiki.co.jp/-9-RX-80005 Operations and Functions

5-2. Other functions

5-2. Other functions<Calibration History/Various Trend/Event History Functions>
The gas detector has history and trend functions. To use these functions, please contact RIKEN KEIKI.

NOTE

The data logger management program (option) is required to use the history and trend functions. Please
request RIKEN KEIKI.

- 33 -RX-8000

6 Maintenance

6-1. Maintenance intervals and items

6Maintenance
The gas detector is an important instrument for the purpose of safety.
To maintain the performance of the gas detector and improve the reliability of safety, perform a regular
maintenance.

6-1. Maintenance intervals and items

 Daily maintenance: Perform maintenance before beginning to work.
 Monthly maintenance: Perform alarm test once a month.
 Regular maintenance: Perform maintenance once or more every six months to maintain theperformance as a safety unit.
Maintenance
item
Battery levelcheck
Concentration
display check

Maintenance content

Check that the battery level is sufficient.

Make the gas detector draw in fresh air. Check thatthe concentration display value is zero (or 20.9
vol% on the oxygen deficiency meter). When thereading is incorrect, perform the air calibration
after ensuring that no other gases exist around it.
Flow rate check See the flow rate indicator to check for
abnormalities.
Filter checkCheck the dust filter for dust or clogging.
Span adjustment Perform the span adjustment by using thecalibration gas.

Daily
maintenance

Monthly
maintenanceRegularmaintenance

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<About Maintenance Services> We provide services on regular maintenance including span adjustment, other adjustments andmaintenance.
To make the calibration gas, dedicated tools, such as a gas cylinder of the specified concentration andgas sampling bag must be used.
Our qualified service engineers have expertise and knowledge on the dedicated tools used for services,along with other products. To maintain the safety operation of the indicator/alarm unit, please use ourmaintenance service.
 The followings are typical maintenance services. For details, please contact RIKEN KEIKI.

RX-8000- 34 -6 Maintenance

6-1. Maintenance intervals and items

Main services
Battery level
check
Concentration
display check:

Checks the battery level.

:

Flow rate check:

Filter check:

Span adjustment
Cleaning andrepair of device(visualdiagnosis)
Device operationcheck
Replacement ofconsumableparts::

Verifies that the concentration display value is zero (or 20.9 vol% on the oxygen deficiency
meter) by using the zero gas.
Performs the air calibration if the reading is incorrect.
Checks the flow rate indicator to find abnormalities.
Checks the flow rate by using an external flow meter to verify the correctness of the flow rate
indicator on the gas detector. If the flow rate is incorrect, performs the flow rate adjustment.
Checks the dust filter for dust or clogging.
Replaces a dirty or clogged dust filter.
Performs the span adjustment by using the calibration gas.
Checks dust or damage on surface of the gas detector, cleans and repairs such parts of thegas detector.
Replaces parts which are cracked or damaged.

:

Uses the keys to check the operation of functions and parameters.

:

Replaces consumable parts, such as a sensor, filter and pump.

- 35 -

RX-80008 Troubleshooting

8Troubleshooting
The troubleshooting does not explain the causes of all the malfunctions which occur on the gas
detector. This simply helps to find the causes of malfunctions which frequently occur. If the gas
detector shows a symptom which is not explained in this manual, or still has malfunctions eventhough remedial actions are taken, please contact RIKEN KEIKI.

<Abnormalities on Unit>
Symptoms
The power cannot
be turned on.

CausesThe battery level is toolow.

Actions
Lithium ion battery unit: Charge the battery unit in a
non-hazardous area.
Dry battery unit: Replace all the three dry batteries with thenew ones in a non-hazardous area.

The power switch was
not pressed longenough.
Improper installation of
the battery unit

For power-on, keep the POWER switch pressed until a beepis heard (about two seconds).

Abnormaloperations

Disturbances by sudden
surge noise, etc.

Turn off and restart the indicator/alarm unit.

Key operations aredisabled.

Disturbances by sudden
surge noise, etc.

Systemabnormalities[FAIL SYSTEM]
Sensorabnormalities[FAIL SENSOR]

A circuit abnormality
occurred.

In a non-hazardous area, remove the battery unit once, andreinstall the battery unit, and turn on the power to perform
operations.
Request RIKEN KEIKI for repair.

A sensor has failed.

Request RIKEN KEIKI to replace the sensor.
(Only at power-on, press the RESET switch to continue theoperation using gas sensors except the sensor which hasfailed.)

A low battery
voltage alarm istriggered.
[FAIL BATTERY]

The battery level is low.

Lithium ion battery unit: Turn off the power and charge thebattery unit in a non-hazardous area.

A low flow rate
alarm is triggered.
[FAIL LOW FLOW]

Water or oil, etc. wasdrawn in.

Check the gas sampling hose for any damage or mark ofdrawn water or oil, etc.

The gas sampling hoseis clogged.

Check the gas sampling hose for connections, clogging,twisting, etc.

The gas detector waspowered on at a lowtemperature or has notbeen used for a longtime.
The pump hasdeteriorated.

Turn on the power several times. The pump may start
operating.

Check whether the battery unit is properly attached to themain unit.

Dry battery unit: Turn off the power and replace the drybatteries with new ones in a non-hazardous area.

Request RIKEN KEIKI to replace the pump.

- 45 -RX-8000

8 Troubleshooting
Air calibration
impossible[FAIL AIR CAL]
Clock
abnormalities[FAIL CLOCK]Fresh air is not suppliedaround the gas detector.

Supply fresh air.

Abnormalities of theinternal clock

The batteries
cannot berecharged.
(Lithium ionbattery unit only)

The charger is notconnected properly.

Make a setting of Date/Time.
If such a symptom is observed repeatedly, the built-in clock
is seemingly malfunctioning. Thus, it must be replaced.
Request RIKEN KEIKI for replacement.
Connect the AC powered charger to the wall electric outlet
and jack properly.

A charging circuit
abnormality occurred.
The batteries have been
fully charged.

Request RIKEN KEIKI for repair.
When fully charged batteries are charged again, thecharging indicator lamp does not go on.

<Abnormalities of Readings>
Symptoms
The reading rises(drops) and it
remains so.

CausesDrifting of sensor output
Presence of interferencegas
Slow leakEnvironmental changes

Slow response

Span adjustment
impossible

RX-8000

Clogged dust filter
Bended or clogged gas
sampling hose
Condensation is formed
inside the gas sampling
hose.
Deteriorated sensor
sensitivity
Improper calibration gas
concentration
Deteriorated sensor
sensitivityActionsPerform the air calibration.
Check if any interference gas, such as solvent, etc., ispresent and take an appropriate action.
A very small amount of the gas to be detected may beleaking (slow leak). Ignoring it may cause dangers.
Perform the air calibration.
In particular, the galvanic cell type is affected by the airpressure.
Replace the dust filter.
Fix the defective parts.
Fix the defective parts.

Replace the sensor with a new one.
Use the proper calibration gas.
Replace the sensor with a new one.

- 46 -9 Product Specifications

9-1. List of specifications

9Product Specifications
9-1. List of specifications
Detection principle
Gas to be detected
Detection range<Service range>
Display resolution
Accuracy of thereading(under an identicalcondition)
Response time
(under an identicalcondition)
Concentration
display
Detection method
Suction flow rate
Displays
Buzzer soundvolumeFault alarm/self
diagnosis
Fault alarm display
Fault alarm pattern
Transmission
specifications
FunctionsPower supply
Continuous
operating time
Operatingtemperatures
Operatinghumidities
Structure
Explosion-proof
structure

Galvanic cell type(OS)Oxygen (O2)
0 - 25 vol%<to 40 vol%>0.1 vol%Within ±0.7 vol%Non-dispersive infrared type (RI)
Combustible gas (HC or CH4) *1*5
0 - 100 %LEL/to 100 vol%0.5 %LEL (0 - 100 %LEL)/0.5 vol% (Up to 100 vol%)Within ±5 %LEL (0 - 100 %LEL)
Within ±5 vol% or ±10 % of the reading (Up to 100 vol%)90 % response:
90% response: within 30 seconds *2
within 20 seconds *2
90 % response:
90% response: within 2 minutes *3*3
within 2 minutes
LCD digital (seven-segment + Symbol + Bar meter)
Pump suction type0.75 L/min or more (Open flow rate)
Battery level icon, pilot indicator, and pump operation status indicator
95 dB (A) or higher (30 cm)
System abnormalities, sensor abnormalities, battery voltage drop, calibration failure,
and low flow rate
Lamp blinking, intermittent buzzer sounding, and detail display
Self-latching
IrDA (for data logger)
LCD backlight, data logger, peak display, log data display, and pump stop
Dedicated lithium ion battery unit [BUL-8000(R), BUL-8000(R1)](Dedicated dry battery unit <AA alkaline dry batteries*4  3> [BUD-8000(R)] can alsobe used.)
BUL-8000(R), BUL-8000(R1): About 15 hours (25 °C, no alarm, no lighting, andbattery fully charged)
BUD-8000(R): About 10 hours (25 °C, no alarm, and no lighting)-20 - +50 °C
Below 95 %RH (Non-condensing)Drip-proof and dust-proof performances (compliant to IP67 level)
Intrinsically safe explosion-proof structure- 47 -RX-8000

10 Definition of Terms

10Definition of Terms
vol%
LEL

Gas concentration indicated in the unit of one-hundredth of the volume
The acronym of Lower Explosion Limit.
LEL refers to the lowest concentration of a combustible gas in air capable ofcausing explosion when ignited.

- 49 -RX-8000